查询词典 mass

The effects of mass ratio on dynamic Characteristics were investigated by solving the dynamic equation of the model. The approximate formula of seismic response were deduced based on Energy Conservation Law.

通过求解简化模型的动力方程，分析了质量比对连续梁桥纵桥向的动力特性的影响，并用能量法推导了低阶振型地震反应的近似公式。

The random phase approximation method and the Feymann-Hellman theorem are used to calculate the seventh order glueball mass of the 2+1-D SU(2) lattice gauge theory.

采用无规相近似方法，用空心图作为试探波函数，利用Feymann Hellman定理计算七阶 2 + 1维SU(2 )格点规范场的胶球质量，在弱耦合区 1/g2 =1。

The chloroform layer and the aqueous layer were separated by multiple column chromatography including macroporous resin, silica gel and polyamide column and preparative HPLC. The compounds obtained were identified by mass spectra and NMR data.

大青叶乙醇提取物，用氯仿萃取后得到氯仿层和水层，各层再分别采用硅胶柱、大孔树脂柱、聚酰胺柱、制备液相、葡聚糖凝胶柱层析及重结晶等分离手段进行分离、纯化，并应用化学性质和质谱、波谱法（1H-NMR、13C-NMR、HMBC）鉴定其化学结构。

The average molecular mass of polysaccharide is 8.6×10^4 u. Polysaccharide is composed of glucose, arabinose and uronic acid. There is no absorption peak of protein and nucleic acid at 280 and 260 nm.

大叶金花草多糖平均分子质量为8.6×10^4 u，由阿拉伯糖、葡萄糖和糖醛酸组成，在260和280nm处有多糖无核酸和蛋白质的吸收峰。

In the first part presented in Chapter 3, the previous work on the SKAWs in two limit case of 1≥β≥me/mi and β≤me/mi≤1 was generalized to the case of an arbitraryβ value where β is the ratio of thermal pressure to magnetic pressure, me(I is the electron mass, and it was showed that the SKAW accompanied by both dip and hump density solitons are possible.

这第一部分中，首先将前人关于这两个极限情行下（即1≥β≥me/mi和β≤me/mi≤1）的SKAW的工作推广到更一般的参数范围，给出了SKAW存在的一般判据，并证明在β~me/mi的情行下，伴随有稀疏和压缩密度孤子SKAW都是可能的。

Applications of integral calculus include computations involving area , volume , arc length , center of mass , work , and pressure .

积分的应用，涉及领域包括计算，体积，弧长，中心的质量，工作和压力。

Department of Scientific History and Archaeometry; Graduate University of Chinese Academy of Sciences; Beijing 100049;4.Institute of Archaeology; Chinese Academy of Social Sciences; Beijing 100710; China;The fabrication technologies in terms of phase composition,structure,firing temperature,porosity,density and water permeability of ceramic water pipes and contrastive ceramic tilesexcavated from Anyang Yin Ruins of Shang dynasty were studied by X-ray fluorescence,X-ray diffraction and dilatometer,respectively.It was found that the contents of CaO,K2O,MgO and P2O5 in CWP were relatively higher than those in contrastive CT.The difference was further confirmed by the mass ratio of flux...

采用X射线荧光、X射线衍射、热膨胀等分析手段对比研究了安阳商代陶水管的制作工艺，发现陶水管化学成分中各类熔剂的质量分数均略高于对比陶片中熔剂的质量分数，CaO、K2O、MgO等助熔剂与A l2O3的质量比进一步证实该现象，而这种差异性则外在地表现为陶水管的气孔度低于对比陶片以及陶水管热膨胀曲线中出现玻璃化现象，该结果表明陶水管原料应为一种易熔粘土，或者在沉淀粘土中人为地掺和了草木灰类掺和料，这有利于陶水管烧制与成型，有助于熔剂在熔融状态下，较好地进入陶水管中的空隙，使陶水管变得更加致密，一定程度上有利于防止陶水管的渗水，显示出陶水管制作工艺的特殊性。

We use proteomic approach:two-dimensional electrophoresis and mass spectrometry to detect the proteins expression changes modulated by areca nut extracttreatment and attempted to link the correlation between OSCC and areca use.

本研究使用蛋白体学研究方法――二维电泳搭配质谱仪分析法，探讨口腔细胞受槟榔萃取物影响之蛋白质表现的改变，期望藉由高产能的策略探讨槟榔与口腔癌间的相关性。

Argosy engineers have found that its R-AT-MM system which is based on Micro Motion Coriolis mass meters, Phase Dynamics water cut meters, and the R-AT-MM controller, best serves the needs of these customers.

Argosy的工程师们发现其基于高准科氏质量计、Phase Dynamics水量计以及R-AT-MM控制器的R-AT-MM 系统最能满足这些客户的需要。

Parson Malthus predicted mass starvation 250 years ago, as the population was growing geometrically, doubling each generation, while agricultural production was going arithmetically, by 2 percent or so a year.

帕尔森·马尔萨斯在250年前就曾预言大饥荒不可避免，理由是，随着人口以几何级数的爆增，每一代人的数量都翻了一番，而农业产量每年只有屈指可数的百分之二左右。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。